EP 0206508 B1 19911106 - DIGITIZER FOR A COMPUTER
Title (en)
DIGITIZER FOR A COMPUTER
Publication
Application
Priority
JP 10539985 A 19850517
Abstract (en)
[origin: EP0206508A2] A digitizer comprises a winding coil (7) for generating a magnetic field to indicate coordinate position in response to an energizing signal, a substrate (1) having conductive lines (Xi,Yj), a detector circuit for detecting phase inversion of an induction signal induced on the conductive lines and a counter (4) for measuring the time interval between the starting time of selecting one of the conductive lines and the detecting time when phase inversion occurs. A coordinate register (8) holds a coordinate value. A scanning circuit (2,3) selects the conductive lines in turn and is arranged to receive a gate signal from the counter at an input terminal thereof in synchronism with the energizing signal and includes a circuit (15), for example a decoder, for selecting one of the conductive lines when the gate signal is received.
IPC 1-7
IPC 8 full level
G06F 3/046 (2006.01); G06F 3/033 (2006.01); F02B 75/02 (2006.01)
CPC (source: EP KR US)
G06F 3/046 (2013.01 - EP US); H03M 1/00 (2013.01 - KR); F02B 2075/025 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
EP 0206508 A2 19861230; EP 0206508 A3 19880914; EP 0206508 B1 19911106; DE 3682332 D1 19911212; JP H034928 B2 19910124; JP S61262914 A 19861120; KR 860009552 A 19861223; KR 930007718 B1 19930818; US 4692568 A 19870908
DOCDB simple family (application)
EP 86303752 A 19860516; DE 3682332 T 19860516; JP 10539985 A 19850517; KR 860003839 A 19860517; US 86507586 A 19860519